Molding press



Apr. 10, 1923. 1,451,378

, E. W. THIELE MOLDING PRESS Filed Sept. 22, 1921 2 sheets-sheet l Apr. 1o, 1923. 1,451,378

E. W. THIELE MOLDING PRES S Filed Sept. 22, 1921 2 sheets-sheet? Patented Apr. 10, 1923.

. y s it' 'l' i l MOLDING PRESS.

Application ledseptembei 22, 1921. SerialNo. 502,584.v

T0 all 'whom 'it may conce/m:

Be it known that l, Emmi VVrLHn-LM THIELE, a citizen of Germany, and a resident of HoXter-on-the-VVeser,ilVestphalia, in .the Republic of Prussia, Germany, have invented certain new and useful Improvements in Molding Presses, of which` the following is a specification.

lylypresent invention relates to moldingpresses, but more particularly to moldingpresses for transforming raw materials, subsequently to be burnt in kilns or ovens, into charging-blocks. To produce tlie'latter from raw cement-dust, lime-sandstone, etc, dropp'resses, table-presses and the like have been employed hitherto; But suoli presses operate in a vertical direction and therefore transmit powerful blows to their foundations.

The construction of the modern vertical kilns or ovens, which are charged at the top and which discharge the burntproduct-s automatically at their bottom, makes it desirable that lpresses employed for the production of charging-blocks to be burnt in such kilns or ovens should be erected in close proximity to the mouththereof. To employ heremoldingpresses of the kind mentioned above, it would lbe necessary to build solid foundations of a height almost equal to that of the kiln or o venutilized, which would cause exceedingly high expenses.

` To avoid these drawbacks l provide a `molding-press equipped with a molding- 'drum'rotating in a vertical plane and carrying in its circumference a plurality of transversely arranged pairs of moulds in which operate horizontally disposed press-plungers grouped in as many pairs as there are pairs vof moulds. The individual plungers of' each pair of plungers reciprocate in the moulds cooperating with them in such a manner that they are always working in alignment with, but Iin opposition to each other, '.sothat the thrust of each plunger is neutralized by the other plunger associated with it; By this arrangement the rfoundation of the press is protected'L against detrimental vbloyvs and the whole pressure developed by theV Vpress-v plu'ngers isprofitably employed for thepr duction of charging-blocks.

To assure a continuous operation of the molding-press, au'ziiliary' elements,`such as a feed-hopper, a cover Vfor successively closing and y(ip enirig tsaid pairs of moulds automatically, eject'ors for removing the moulded objota 'anden forth, Vare prOvidedand arranged partly at the circumference and partly in the interior of said molding-drum in such relation to said ymoulds and "pressplungers as to successively admit the raw material to the molds, compress it in the latter to charging-blocks, eject these charging-blocksfrom tlie press and transfer -thelmr to the kiln or oven. On account of the 4pre-i ferred arrangement of molds i and press plungers in pairs in combination with l'the several elements cooperatingftherewith, vmy improved molding-press sliows fa' twinllike construction and thusfcombines a remarkably weight with great strength and reliabil- ,Y'

The movements of the plungersrand other movable elements are preferably produced-'by the aid of inclined planes partly'carriedby ythe frame of the press,'and par'tly'supported by the driving-,shaft 'of the molding-drum, as will be more fully shown fand. explained herein-after 4and claimed in the appended 4 claims. i

In'the accompanying drawings, in which one embodiment of my present invention is shown by way of example y:` Figure l is a longitudinaly sectional View taken on line A-TB of FigureV i2; A

Figure 2 isa cross-sectional vview taken on line C-D of Figure 1. A Figure 8 is an elevation of amend-plate yof the press-frame, and Figure 4 is a side-elevation ofthe molding-press with the guard-plate remov'ed, whereas Figure 5 is an end-elevation of the molding-press viewed in the direction" of HJthe arrows shown in Figures l andii. l

The frame of the molding-press chiefly consists'of a tubular casing'l andtwo standards 2 firmly held together by al plurality of tie-rods 3. ln the bearings'll of'these standards the horizontally arranged driving-shaft 5 of a'y molding-diurni 6 vis joiirnalled and rotated vby the aidof` abelt-gearing 7 f `and a wori'i'i-wheel-gearing 8, as *indicatedinfFigures l, @and 5.` i ference of said `niol diii, 1g-drum"Qa` 'plurality of transversely disposed channels Q'Yare'aranged equidistant from each other." The number o'f these channels "and theircon'iig'-A i the individual moulds have a bottom common to both, i. e. said division-wall. These bottoms 10 are preferably made exchangeable to simplifythe insertion and removal of ejectors 12, the double heads 13 of which are forming a part of the inner wall of the several pairs of moulds 11. Each ejector is on the one hand guided in a radial slot 14 of the web o1' the molding-drum 6 and on the other hand by means of its central slot 15 straddling ther division-wall or bottom 10, Figures 1 and 2. .These ejectors are radially moved in and out by means of a pair of box-cams 16 rigidly connected with the standards 2 by the aid oftubular supports 17 surrounding the driving-shaft ln these box-cams grooves 18 are provided and adapted to engageV studs or antiriction-rollers 19 of the ejectors 12, as indicated in Figures 1 and 2. A cover 20, adapted to successively close the moulds 11 after being charged, is attached to a movable traverse 21 guided in slots 22, which slot-s are arranged in the standards 2 concentrically to thedriving-shaft 5. luring the compressiono the raw material in any one of the pairs of moulds 11 by means of a pair of :press-plungers 23 cooperating therewith the cover 20 is compulsorily advanced by said press-plungers. After the formation of the charging-blocks B in said pair of moulds, the mould-cover 20 is automatically returned toits starting-point by means of counter- `weights 24 adjustably mounted upon double-armed levers 25, which are loosely seated upon the driving-shaft, Figures 1, 2, 4 and On top' of the tubular casing` 1 a teed-hopper 26 is provided to receive the raw material and successively introduce it at theri'ght moment into said pairs ont moulds while pursuing their rotary path.

The. press-plungers 23 are arranged in said moulds 11 in pairs and in alignment with ,each other and with the driving-shaft 5, i. e. horizontally. Each of these plungers carries at its outer end a pin 27 carrying an antifriction-roller 28, which cooperates with a curved wedge-shaped cam 29 fixed to, or formingan integral part of one of the standards 2. These cams are adapted to force the plungers 23 into the moulds containing them. Figures 1, 3 and 4. The outer end of each pin 27 is preferably proI vided with an antifriction-roller 30 adapted to be guided in one of the diverging camgrooves 31 of the casing 1 to retract the press-plunger carrying said antiirictionroller after the molding-process of the charging-blocks B has been accomplished.

My improved molding-press operates as followszf `When the molding-drum 6 is rotated in a vertical plane in the direction indicated by the arrows in Figures 1.l ,2 and 4, the plungers 28 of the ascending pair of moulds l1 Figure 4.

are moved outward by the action of the camgrooves 31 upon the antifriction-rollers 30. 11s soon as the moulds 11, now fully opened. reach the outlet 32 ot' the feed-hopper these moulds are charged with raw material, which charging-process is completed before the charged pair of moulds has passed the rear-wall of the feed hopper. YWhen these moulds have reached said rear-wall they are gradually closed by the mould-cover 2O abutting` against said rear-wall, Figure 2. At the instant the moulds have been completely closed, the antifriction-rollers 30, now acting as a driving means, will strike against abutments 33 of the traverse 21 and thus compel the cover 2O to advance in accordance with the moulds 11 downwardly. Simultaneously herewith the plungers, 23 are 'forcibly moved toward each other from opposite sides by means ot' the wedgeshaped cams 29 and thus compress the contents of the moulds 11 into charging-blocks B. This operation is completed when the rollers 28 reach the 'Hat extension 34 of the cams 29. it this moment the antifrictioiu rollers 30 break their contact with the abutments 33. because during the period ot compression the plunge-rs 23 were moved inward suiiiciently to allow the antiiriction-r-ollers 30 to pass the inner ends ot the abutments 33. The traverse 21 can now be returned to the rear-wall of the feed-hopper by the action of the counter-weights 24, as will be readily understood. The cover 20 is therefore again in a position to close the next pair of charged moulds as soon as it is passing the rearewall of the it'eed-hopper.

During the operations of charging and compression the double head 13 of the ejector 12 belonging to the charged pair of moulds under consideration is kept at rest and remains flush with the inner or bottom-wall of said pair of moulds by guiding the lateral studs or antitriction-rollers 19 of the ejector 12 in the concentric part of' the grooves 18 of the box-camsl 16. This head 13 of the ejector 12 therefore forms a movable part ot the moulds 11. in which the cover 2() performs a similar duty. In view o1 this arrangement the traverse 21 must be strong enough to withstand the pressure exerted in the moulds 11 during the compression of the raw-material. in order to avoid an inadmissible opening o'l the moulds during the process of compression. The reaction of the plungers 23 on the wedge-shaped cams 29 is transmitted by the standards 2 to the tierods 3 which are thereby put under tension and are thus enabled to exempt the foundation of the press 'from any detrimental downward thrusts or blows.

r1`he charging-blocks B formed in the moulds 11 remain in the latter under pre-ssure until the antifriction-rollers 28 leave the extensions 34, Simultaneously herewith the a-ntifrictiQn-rollers 30 enter the camgrcoalcs :31 of the ytubular casing l, Whereiipon the plungers Iare Withdrawn lfrom .the blocks B still contained vin the moulds .of .the eccentric parts of the grooves 18 of .the box-cams 16, will gradually andsimultaneously push the moulded charging-blocks B out of the moulds lll into an enlargement B5 ofthe casing l until finally they will r,drop Ythrough the bottom-opening '36 onto a .conveyery 37 which` transfers .them to the kiln or oven, not shown.

While the plungers 23 ascend they are ,still further retracted yuntil they have .reached .their extreme endeposition, whereas :theejector 12 is drawn yfully inward again,

so .that the. several .Operations described above can be repeated in duesuccession. It isevident .that the remaining pairs ofmoulds and press-plungers as Well as the parts intimately connected with .themare made and operated as the similar parts described above. so that with. a molding-press construct/ed in accordance .with the embodiment shown and described eightcharging-blocks B are produced during each revolution of the molding-drum.

A guard-plate 38 is provided and removably connected with two of the: tie-rods 3 in such a manner as to give readily access to the interior of the molding-press, Figure 2.

' I claim l. A molding-press of the character described, comprising a molding-drum rotating in a vertical plane, moulds arranged in pairs inthe circumference of said moldingdrum, press-plungers horizontally disposed in pairs in said pairs of moulds', means for successively charging said pairs of moulds, means for closing each pair of moulds separately when charged, means for forcing the individual. plungers of each pair of press-plungers from opposite sides into the pair of moulds charged last, ymeans for ejecting the moulded objectsfrom said pair of moulds, and means for retracting said pair of press-pluiigers, substantially as set forth.

2. A molding-press of the character described, comprising' a molding-drum rotating in a vertical pla-ne, pairs of moulds arranged in the circumference of said moldingdrum parallel with. the axis of rotation thereof, a common bottom separating` the individual moulds of each pair of moulds, a pair of press-plungers disposed in each pair of said moulds, meansfor charging the individual moulds of the same pair of moulds simultaneously, means successively closing said pairs vof kmoulds when charged, means for forcingthe plungers of the same pa-ir of pieSs-plungers in opposite directions into ,the .charged pair of moulds cooperating therewith, an ejector provided for each pair of moulds and adapted to eject the moulded objects simultaneously therefrom, means for operating said ejector, and means for retractiiig said pair of press-plungers, substantially as set forth.

' 3. A molding-press of the character described, comprising amolding-drum pro- `vided With a plurality of channels transversely arranged in the circumference of said molding-drum, a division-Wall bisecting` each of said channels to transform the latter into a pair of moulds with a common bottom, a'pair 4of press-plungers horizontally arranged in each of said pairs of moulds, means for successively charging said pairs of moulds, a cover adapted to successively close said pairs of moulds automatically upon being charged, means for forcing the Vindividual plungers of each pair of plungers from opposite sides into the pair of moulds `charged last, means on each of said pressplungers. adapted to compulsorily advance said cover in accordance with said charged pair of moulds, means `for automatically reytracting'said cover,""an ejector arranged in said molding-drum in proximity to each pair of said moulds; cams adapted to keep each ejector alternately stationary, push it radially outward, and retract it during each revolution of said molding-drum; and means for retracting said pairs of press-plungers, substantially as set forth.

4:. A molding-press of the character described comprising a rotary molding-drum, moulds arranged in pairs in the circumference of said molding-drum, a removable common bottom in each of said pairs of moulds, a pair of press-plunger's arranged in alignment with each other in each pair of said moulds, a feed-hopper adapted to successively charge said pairs of moulds, a sliding cover for successively closing said pairs of moulds when charged, stationary Wedge-shaped cams adapted to force the iridividual plungers of each pair of pressplungers into the last charged pair of moulds from opposite sides simultaneously, counter- Weighted levers for retracting said slidingcover after the completion of the moldingoperation, ejectors each provided Withahead for forming parts of the Walls of the pair of izs frame, pairs of moulds arranged in the circumference of said molding-drumg pressplungers operating in pairs in each of said pairs of moulds in alignment with, and in opposition to each other; a Jfeed-hopper for successively charging said pairs of moulds, a sliding cover adapted to successively close said pairs of moulds when charged, Wedgeshaped stationary-cams on said frame for forcing the individual plungers of said pairs of plungers successively from opposite sides into the pair of moulds charged last, counter- Weighted levers adapted to retract said cover automatically, an ejector disposed in each pair of moulds and adapted to eject therefrom the moulded objects simultaneously, stationary box-cams adapted to successively control the movements of said ejectors, a tubular iframe-casing provided With camgrooves, means on said press-plungers adapted to cooperate with said cam-grooves for retracting said pairs of press-plungers, and a guard-plate detachably connected with said frame, substantially as set forth.

6. A molding-press of the character described, comprising a stationary iframe, a driving-shaft journalled in -said frame, a molding-drum seated on said driving-shaft and rotating in a vertical plane, pairs of moulds arranged in the circumference of said molding-drum, press-plungershorizontally arranged in said pairs of moulds, a cover for successively closing said pairs of moulds, a traverse carrying said cover and guided in slots arranged in said frame concentrically to said driving-shaft, counterweighted levers revoluloly seated upon said driving-shaft and connected With said traverse for automatically retracting said cover, friction reducing-means at the external end of each press-plunger, stationary cams With inclined Working-faces cooperating with said friction reducing-means, ejectors arranged Within said molding-drum, box-cams likwise arranged Within said moldg ing-drum vfor operating said ejectors, antifriction-rollers carried by said press-plungers, a tubular casing forming part of said frame and provided with cam-grooves diverging from each other and adapted to engage said antifriction-rollers for retracting said press-plungers, and a detachable guardplate for giving readily access to the interior of said molding-press, substantially as set Jforth.

Signed by me at HoXter on the Weser, Germany, at this 16(` day of August 1921.

EITEL WILHELM THIELE.

Witnesses RUnoLr` SoRoDnR, HEINRICK SEEHIAUM. 

